7. A drawing of magnetic lines of force provides information on the
A. source of the field
B. type of magnet
C. strength of the field
D. length of the magnet

8. A bottle of water removed from a refrigerator soon becomes covered with droplets of water because the
A. bottle is porous
B. bottle is full of water
C. water in the surrounding atmosphere is colder than the water in the bottle
D. water in the surrounding atmosphere is warmer than the water in the bottle

9. The volume of a metal ball was determined by dropping it into a measuring cylinder containing20cm3of water and the water level rose to 35 cm3.If the mass of the ballis35 g, calculate its density.
A. 1.0 gcm-3
B. 1.6 gcm-3
C. 1.8 gcm-3
D. 2.3 gcm-3

10. A boy stepped on a bananapeel on the ground and fell because the
A. boy was not wearing shoes
B. ground was too hard
C. banana peel reduced the friction on the ground
D. banana peel increased the friction on the ground

11. Which of the following conditions describes a first class lever?
A. The load is between the effort and pivot
B. The pivot is between the effort and the load C. The effort is between the pivot and the load D. The load arm is equal to the effort arm

12. A man did 75J of work by lifting a50 N load from the floor on to a shelf.Calculate the height of the shelf
A. 0.67 m B. 1.50 m C. 25.00 m